incidentally the pain thusfar has been relatively mild, but is very deep, dull and annoying - i would say maybe 4 out of 10 at its worst.. maybe 5.. it also comes and goes - seems like trying to correct my posture always makes it worse..

I also get pressure that goes up behind my eyes sometimes, and during the dizziness I had very bad eye strain and eyelid pain in the right eye. It now will sometimes manifest as eyelid twitching, that feels like something is stuck above my eye.

Also the base of my skull feels like a drum when I walk sometimes,
and there are often clicks and pops.. I'm thinking it might be muscle spasms?

Only things i can think of are
vestibular neuritis (or another vestibular problem)that has affected my cervical/ocipital nerves,
chiari maformation
vertebral artery problem
cervical disc compression
occipital neuralgia